Why did Tianjin become a municipality directly under the central government?

Tianjin's becoming a municipality directly under the central government is the need of the capital. 19 13 Tianjin became the capital of Zhili. 1June, 928, Tianjin was changed into a special city. In July of the same year, Zhili was renamed Hebei, and the provincial capital was still Tianjin. 10 June, the provincial capital moved to Beiping. June 1930 Tianjin was changed into a municipality directly under the central government. In June 65438+in the same year 10, Hebei Province moved to Tianjin again, so it was changed to a provincial city. 1June, 935, Hebei Province moved to Baoding, and Tianjin was changed to a municipality directly under the Central Government. 1945 After Japan surrendered in August, Tianjin remained a municipality directly under the central government. 1949 65438+1October 15, China People's Liberation Army liberated Tianjin, and Tianjin was designated as a municipality directly under the Central Government of North China. 10 year 10 month/day, People's Republic of China (PRC) was founded. At that time, Tianjin around Beijing was the most developed city and the gateway of Beijing to the sea, so it was designated as a municipality directly under the central government. But at that time, Tianjin's economic capacity was limited, and Beijing's influence had covered North China. In February 1958, 1 1, Tianjin was changed to a city under the jurisdiction of Hebei Province, and the provincial capital was moved from Baoding to Tianjin. However, Tianjin is also an important seaport in the north, with a very important geographical position and outstanding strategic significance. Its population and urban development scale are among the best in the country, so it was restored as a municipality directly under the central government in 1967+ 10.